2000-02-24 02:51:47 +00:00
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=pod
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=head1 NAME
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2000-02-24 11:55:57 +00:00
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RAND_egd - query entropy gathering daemon
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2000-02-24 02:51:47 +00:00
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=head1 SYNOPSIS
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#include <openssl/rand.h>
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int RAND_egd(const char *path);
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=head1 DESCRIPTION
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RAND_egd() queries the entropy gathering daemon EGD on socket B<path>.
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2000-02-24 03:36:01 +00:00
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EGD is available from http://www.lothar.com/tech/crypto/ (C<perl
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Makefile.PL; make; make install> to install). It is run as B<egd>
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I<path>, where I<path> is an absolute path designating a socket. When
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RAND_egd() is called with that path as an argument, it tries to read
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2000-02-24 19:33:58 +00:00
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random bytes that EGD has collected. The read is performed in
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non-blocking mode.
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2000-02-24 03:36:01 +00:00
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2000-07-03 17:26:51 +00:00
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Alternatively, the EGD-compatible daemon PRNGD can be used. It is
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available from
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http://www.aet.tu-cottbus.de/personen/jaenicke/postfix_tls/prngd.html .
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2000-02-24 03:36:01 +00:00
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=head1 RETURN VALUE
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2000-02-24 02:51:47 +00:00
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RAND_egd() returns the number of bytes read from the daemon on
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success, and -1 if the connection failed or the daemon did not return
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enough data to fully seed the PRNG.
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=head1 SEE ALSO
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L<rand(3)|rand(3)>, L<RAND_add(3)|RAND_add(3)>, L<RAND_cleanup(3)|RAND_cleanup(3)>
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=head1 HISTORY
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RAND_egd() is available since OpenSSL 0.9.5.
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=cut
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